hpr2756 :: Bash Tips - 20
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- Publication date
- 2019-02-25
- Topics
- Bash, array, delete, positional parameters
- Contributor
- HackerPublicRadio
- Language
- English
Series: Bash Scripting
Source: http://hackerpublicradio.org/eps.php?id=2756
Original audio: http://archive.org/download/hpr2756/hpr2756_source.flac
Tidying loose ends (Some collateral Bash tips)
Deleting arrays
I forgot to cover one thing on my list when doing the last show: I forgot to explain how to delete arrays and array elements. I’ll cover that topic in this episode.
Positional and Special parameters
I have also avoided talking much about the positional and special parameters in Bash: '$1'
, '$2'
, '$#'
and the rest. I will cover (some of) these in this episode.
Silly titles
I stopped doing the weird episode titles by episode 14 because I thought the joke was getting tired. However, I think a few people missed them (and a certain HPR colleague was found vandalising my new titles as they were being posted ;-), so I have added them inside the notes on the older shows and am adding one here – as a homage to silliness.
Long notes
I have provided detailed notes as usual for this episode, and these can be viewed here.
Links
- “GNU BASH Reference Manual”
- Section “3.4 Shell Parameters”
- Section “4 Shell Builtin Commands”
- Section “4.1 Bourne Shell Builtins”
- Section “4.2 Bash Builtin Commands”
- Section “4.3.1 The Set Builtin”
-
POSIX Shell Command Language: unset
- Previous episodes under the heading Bash Tips:
- HPR episode 1648 “Bash parameter manipulation”
- HPR episode 1843 “Some Bash tips”
- HPR episode 1884 “Some more Bash tips”
- HPR episode 1903 “Some further Bash tips”
- HPR episode 1951 “Some additional Bash tips”
- HPR episode 2045 “Some other Bash tips”
- HPR episode 2278 “Some supplementary Bash tips”
- HPR episode 2293 “More supplementary Bash tips”
- HPR episode 2639 “Some ancillary Bash tips - 9”
- HPR episode 2649 “More ancillary Bash tips - 10”
- HPR episode 2659 “Further ancillary Bash tips - 11”
- HPR episode 2669 “Additional ancillary Bash tips - 12”
- HPR episode 2679 “Extra ancillary Bash tips - 13”
- HPR episode 2689 “Bash Tips - 14 (Some auxiliary Bash tips)”
- HPR episode 2699 “Bash Tips - 15 (More auxiliary Bash tips)”
- HPR episode 2709 “Bash Tips - 16 (Further auxiliary Bash tips)”
- HPR episode 2719 “Bash Tips - 17 (Additional auxiliary Bash tips)”
- HPR episode 2729 “Bash Tips - 18 (Extra auxiliary Bash tips)”
- HPR episode 2739 “Bash Tips - 19 (Supplemental auxiliary Bash tips)”
- Resources:
- Examples: bash20_ex1.sh, bash20_ex2.sh
- Addeddate
- 2019-02-22 13:10:15
- External_metadata_update
- 2019-03-29T12:48:32Z
- Identifier
- hpr2756
- Scanner
- Internet Archive Python library 1.8.1
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